1 Answer
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You can use the flags -0 (none) to -9 (best) to change compressionrate

Excluding files can be done via the -x flag. From the man-page:

-x files
--exclude files
Explicitly exclude the specified files, as in:
zip -r foo foo -x \*.o
which will include the contents of foo in foo.zip while excluding all the files that end in .o. The backslash avoids the shell filename substitution, so that the name matching
is performed by zip at all directory levels.
Also possible:
zip -r foo foo -x@exclude.lst
which will include the contents of foo in foo.zip while excluding all the files that match the patterns in the file exclude.lst.
The long option forms of the above are
zip -r foo foo --exclude \*.o
and
zip -r foo foo --exclude @exclude.lst
Multiple patterns can be specified, as in:
zip -r foo foo -x \*.o \*.c
If there is no space between -x and the pattern, just one value is assumed (no list):
zip -r foo foo -x\*.o
See -i for more on include and exclude.